Yield surface
= Yield surface
A <yield surface> separates yielded material, where <stress> exceeds the <yield criterion> and deformation occurs, from an unyielded plug where the deformation rate vanishes.
= Yield surface
A <yield surface> separates yielded material, where <stress> exceeds the <yield criterion> and deformation occurs, from an unyielded plug where the deformation rate vanishes.